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3. ASSEMBLING THE MICROSCOPE
3.1 Illumination
(Halogen)
3.1.1 Halogen bulb
The quartz halogen bulb, used as a light source, has higher luminance and colour temperature than
conventional tungsten lamps. The luminance of halogen bulb is approximately four times brighter than
the conventional tungsten lamps.
As long as the lamp voltage is kept constant, the halogen lamp maintains the same level of brightness
and colour temperature regardless of whether it is new or nearing the end of its life span.
3.1.2 Installing the bulb
In order to prevent electric shock please always make sure the
power switch
in
“off”
position and
unplug the power cord before installing or replacing the lamp.
The bulb and the lamphouse become very hot during and after a period of operation.
Risk of burn – Do not touch the bulb during or immediately after a period of operation.
Make sure the bulb has cooled sufficiently before attempting to replace the lamp.
50W Halogen
The applicable halogen bulbs are the 12V 50W HAL high-intensity bulb.
(Osram, model: 64610 HLX)
Loosen clamp screw of the lamp housing cover using a coin/ tool and remove the cover. (Fig.3-1)
When installing the bulb, do not touch the glass surface of the bulb with bare fingers.
The behaviour may contaminate the bulb by fingerprints, grease, etc., so as to influence the
illumination intensity and flatness finally. If the surface is contaminated, wipe it clean with lens
tissue.
Firmly insert the bulb into the socket pinholes until it reaches the limited position (Fig.3-2). Be
serious do not tilt or bend the lead of the bulb when mounting. (Fig.3-3) or the behaviour may lead
to illumination uneven.
Mount back the lamp house cover and fix the lamp housing cover with clamp screw. (Fig.3-4)